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surveil

C2
verb

Pronunciation

UK

  • /səˈveɪl/transitiveverb

US

  • /sərˈveɪl/

Description

To surveil someone means to watch them carefully and often secretly, usually for security reasons or to gather information. Think of a detective following a suspect; they are surveilling that person. It's more than just looking. It suggests continued observation with a clear purpose. While you might casually watch birds in your garden, police might surveil a suspect or security staff might surveil an area. The word often suggests that the person being watched does not know about it, like in a spy movie.

The root of "surveil" comes from French and means "to watch over." It's most often used in contexts involving law enforcement, intelligence work, or security. You might read about governments surveilling citizens or officers surveilling a location.

Examples

  1. 1

    Police investigation

    Police began to surveil the warehouse after several suspicious late-night deliveries.

    • Usage

      surveil is formal and mostly used in police, security, or technology contexts

  2. 2

    Passive investigation

    The suspect had been surveilled for weeks before the arrest.

  3. 3

    Privacy concern

    Privacy groups warned that the new system could surveil people in public without their knowledge.

Forms and spellings

1 form open this card.

Main spelling

  • surveilverb